import Vue from 'vue'
import VueRouter from 'vue-router'

// 导入组件
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from "../components/goods/Cate.vue"
import Params from "../components/goods/Params.vue"

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',  // 重定向 Welcome 组件
    children: [ // Home组件的子路由
      { path: '/welcome', component: Welcome }, 
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params }
    ]
  },

]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表哪个路径跳转而来
  // next 是一个函数, 表示放行
  //   next() 放行  next('/login') 强制跳转
  if (to.path === '/login') return next();
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // token 值为false, 强制跳转登录页; 值为true通过next()函数放行。
  if (!tokenStr) return next('/login')
  next()
})

export default router
